135418 ⎘
Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe the core receiver having a core forming cutting edge or element, e.g. punch type core barrels
GREASELESS CORE BARREL HEAD ASSEMBLY
#2METHOD AND APPARATUS FOR CONCENTRATED ENERGY DRILLING, CORE DRILLING, AUTOMATED MINING AND TUNNELING
#3Portable seafloor drill rig for submersible for multi-point core drilling
#4Weed remover
#5Pressure-retaining cap screwing and unscrewing device for marine natural gas hydrate pressure-retaining rock-core barrel
#6Deep rock in-situ active thermal-insulation coring device and thermal-insulation coring method thereof
#7Inner barrel crimping connection for a coring tool
#8Coring tools including core sample flap catcher and related methods
#9Coring tools including core sample flap catcher and related methods
#10Coring tool including core bit and drilling plug with alignment and torque transmission apparatus and related methods
#11Instrumented core barrel apparatus and associated methods
#12UNDISTURBED CORE SAMPLER
#13Retrieval tool